1 /*
2 * Common PowerQUICC II code.
3 *
4 * Author: Scott Wood <scottwood@freescale.com>
5 * Copyright (c) 2007 Freescale Semiconductor
6 *
7 * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
8 * pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com>
9 * Copyright (c) 2006 MontaVista Software, Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 */
16
17 #include <asm/cpm2.h>
18 #include <asm/io.h>
19 #include <asm/pci-bridge.h>
20
21 #include <platforms/82xx/pq2.h>
22
23 #define RMR_CSRE 0x00000001
24
pq2_restart(char * cmd)25 void pq2_restart(char *cmd)
26 {
27 local_irq_disable();
28 setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE);
29
30 /* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
31 mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
32 in_8(&cpm2_immr->im_clkrst.res[0]);
33
34 panic("Restart failed\n");
35 }
36
37 #ifdef CONFIG_PCI
pq2_pci_exclude_device(struct pci_controller * hose,u_char bus,u8 devfn)38 static int pq2_pci_exclude_device(struct pci_controller *hose,
39 u_char bus, u8 devfn)
40 {
41 if (bus == 0 && PCI_SLOT(devfn) == 0)
42 return PCIBIOS_DEVICE_NOT_FOUND;
43 else
44 return PCIBIOS_SUCCESSFUL;
45 }
46
pq2_pci_add_bridge(struct device_node * np)47 static void __init pq2_pci_add_bridge(struct device_node *np)
48 {
49 struct pci_controller *hose;
50 struct resource r;
51
52 if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
53 goto err;
54
55 pci_add_flags(PCI_REASSIGN_ALL_BUS);
56
57 hose = pcibios_alloc_controller(np);
58 if (!hose)
59 return;
60
61 hose->dn = np;
62
63 setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0);
64 pci_process_bridge_OF_ranges(hose, np, 1);
65
66 return;
67
68 err:
69 printk(KERN_ERR "No valid PCI reg property in device tree\n");
70 }
71
pq2_init_pci(void)72 void __init pq2_init_pci(void)
73 {
74 struct device_node *np;
75
76 ppc_md.pci_exclude_device = pq2_pci_exclude_device;
77
78 for_each_compatible_node(np, NULL, "fsl,pq2-pci")
79 pq2_pci_add_bridge(np);
80 }
81 #endif
82